Mern Stack Developer

Job Title: Full Stack Developer

Location: Sector-136, Noida

Job Type: Full-time

Experience: 3+ years

About Extramarks:

At Extramarks, we are on a mission to revolutionise education and make it epic for the 21st century learner. We are a leading EdTech company with a global reach and are passionate about creating custom learning solutions that make concepts interesting and fun.

A team of exceptional academicians, tech wizards, and visual storytellers work together to transform complex concepts into engaging, effective, and downright awesome learning modules. That's Extramarks! We are not just talking theory we are already making waves with a dedicated sales force reaching students directly across India.

Join our mission to make learning unforgettable!

About the Role:

We are looking for a Full Stack Developer with strong hands-on experience across the MERN stack (MongoDB, Express.js, React.js, Node.js) to build and scale production web applications. You will own features end to end, from API design and data modelling to responsive UI delivery, working closely with product, design, and QA in an Agile setup.

We work AI-first. We expect you to build with AI coding agents as part of your daily workflow, and to know the difference between code an agent generated and code that is ready for production. This role suits someone who has shipped real features to real users and wants ownership rather than ticket execution.

Key Responsibilities:

Design, develop, and maintain scalable web applications using React.js, Node.js, Express.js, and MongoDB

Build reusable, modular front-end components with React and state management (Redux Toolkit / Context API/ Zustand)

Develop secure RESTful APIs and integrate third-party services and APIs

Design MongoDB schemas, write aggregation pipelines, and optimise queries with proper indexing

Implement authentication and authorisation using JWT, OAuth, and role-based access control

Use AI coding agents to accelerate delivery, then review, refactor, test, and harden that output before it reaches production

Translate Figma designs into responsive, cross-browser, mobile-first interfaces

Optimise applications for performance, page load speed, and scalability

Write unit and integration tests, participate in code reviews, and maintain coding standards

Debug and resolve production issues, including root cause analysis and preventive fixes

Work with Git-based workflows, CI/CD pipelines, and containerised deployments

Collaborate with product managers, designers, and QA in sprint planning, grooming, and daily stand-ups

Document APIs, technical decisions, and module-level workflows

Skills needed:

Strong JavaScript / TypeScript fundamentals (ES6+), including async/await, promises, closures, and event loop behaviour

Solid React.js experience including hooks, state management, form handling, performance optimisation and component lifecycle

Hands-on Node.js and Express.js for backend services and REST API development

Practical MongoDB experience: schema design, aggregation framework, indexing and Mongoose

Proven ability to code with AI agents (Claude Code, Cursor, Copilot, or similar): prompting, context handling, breaking work into agent-sized tasks, and reviewing generated code critically

Judgement on what Al-generated code needs before it ships: test coverage, error handling, securitychecks, performance, and maintainability

Working knowledge of HTMLS, CSS3, and a modern styling approach (Tailwind CSS, Material UI or styled components)

Understanding of authentication flows, API security, and error handling

Git and version control workflows (branching, pull requests, code reviews).

Familiarity with Agile/ Scrum methodologies.

Qualifications & Experience:

Bachelors or master’s degree in computer science or equivalent from a renowned institute.

3+ years of professional full stack development experience on the MERN stack

HR Contact: aman.sharma2@extramarks.com